Writing instrument case



FIG. 1 is a perspective view showing the top, front, and left sides of a writing instrument case showing my new design, the dotted line depiction of a writing instrument being for illustrative purposes only;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image of the right side as shown;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view illustrating the writing instrument case in an open position. 

The ornamental design for a writing instrument case, as shown and described. 